Stroke measuring device and gate hoist with same

Abstract

The utility model provides a stroke measuring device which comprises a limit measuring seat, an upper limit switch, a lower limit switch and a transmission gear. The transmission gear is connected with the limiting measurement seat through a transmission shaft, the transmission shaft is rotatably mounted on a base of a U-shaped structure, and the transmission shaft can drive the limiting measurement seat to reciprocate between the upper limiting switch and the lower limiting switch after being driven; according to the stroke measurement, the actual lifting height of the gate is scaled at equal proportion, so that the stroke measurement can be realized without installing the upper limit switch and the lower limit switch at the actual lifting height position.

Description

Technical Field

[0001] The utility model relates to the technical field of distance measurement, and particularly relates to a stroke measurement device and a gate hoist with the measurement device. Background Art

[0002] A gate hoist, also known as a hoist gate, is a large-scale hydraulic machinery product. The gate hoist is related to the normal operation of hydraulic structures. In addition to meeting the design requirements of general hoisting machinery, work safety and reliability and flexible operation are of special significance;

[0003] When in use, the gate hoist needs to be equipped with a protection measurement device, that is, gate position measurement (which can provide position data in real time during the movement between the starting position and the ending position) or stroke measurement (which provides position data only when reaching the starting position or the ending position), so as to avoid the situation that when the gate encounters an obstacle and cannot move during the lifting process while the motor is still continuously outputting;

[0004] However, for the existing stroke measurement, two limit switches need to be installed at the actual highest point and the lowest point of the lifting respectively. Such a method is very inconvenient for disassembly, installation and maintenance, and there are also potential safety hazards. Summary of the Utility Model

[0005] In view of this, the problem to be solved by the utility model is to provide a stroke measurement device.

[0006] To solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A stroke measurement device includes a limit measurement seat, an upper limit switch, a lower limit switch, and a transmission gear;

[0008] The transmission gear is connected to the limit measurement seat through a transmission shaft. The transmission shaft is rotatably installed on a U-shaped base. After being driven, the transmission shaft can drive the limit measurement seat to reciprocate between the upper limit switch and the lower limit switch.

[0009] The transmission gear is of a double-layer tooth structure. Its outer large teeth are used for meshing and connecting with a driving source part, and its inner small teeth are meshed and connected with a secondary gear coaxial with the transmission shaft.

[0010] The transmission shaft is of a lead screw structure, and the limit measurement seat is of a corresponding lead screw nut structure or is installed on the lead screw nut.

[0011] A transmission sleeve is fixedly sleeved on the transmission shaft. At least two groups of annular grooves are formed on the outer peripheral surface of the transmission sleeve. A delay reversing smooth rod is slidably connected in the annular groove. Openings communicating with the annular groove are formed on both axial end surfaces of the transmission sleeve for the entry and exit of the delay reversing smooth rod.

[0012] The annular groove includes a straight thread groove section and an inclined thread groove section. The straight thread groove section is coaxially arranged with the transmission sleeve. The inclined thread groove section is designed as an inclined helix on the outer periphery of the transmission sleeve. The opening structure is located on the inclined thread groove section.

[0013] One end of the commutation plate faces the annular groove. The delay commutation smooth rods are vertically installed on the commutation plate and are arranged in a circular pattern on the commutation plate. One group of the delay commutation smooth rods is connected to the limit measurement seat. The upper limit switch and the lower limit switch of the travel switch group are installed on the moving path of the delay commutation smooth rods.

[0014] A gate hoist includes a travel measurement device. The gate hoist is a screw-type hoist. The lifting screw of the gate hoist is meshed and connected with the transmission gear of the travel measurement device.

[0015] A gate hoist includes a travel measurement device. The gate hoist is a winch-type hoist. The rotating shaft of the gate hoist is coaxially connected with a driving gear. The driving gear is meshed and connected with the transmission gear, and the thickness of the driving gear is less than the thickness of the transmission gear.

[0016] The advantages and positive effects of the present utility model are:

[0017] This travel measurement scales the actual lifting height of the gate in equal proportion, so that it is not necessary to install the upper limit switch and the lower limit switch at the actual lifting height position, and the travel measurement can also be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model.

[0019] In the drawings:

[0020] Figure 1 is a structural diagram of a screw-type gate hoist with a travel measurement device;

[0021] Figure 2 is a first perspective structural diagram of a travel measurement device of the present utility model under the design of Scheme 1;

[0022] Figure 3 is a second perspective structural diagram of a travel measurement device of the present utility model under the design of Scheme 1;

[0023] Figure 4 is a third perspective structural diagram of a travel measurement device of the present utility model under the design of Scheme 1;

[0024] Figure 5It is a structural diagram of a transmission sleeve of a stroke measurement device of the present utility model under the design of Scheme II;

[0025] Figure 6 It is a structural diagram of a stroke measurement device of the present utility model under the design of Scheme II;

[0026] Figure 7 It is a structural diagram of a winch-type gate hoist with a stroke measurement device;

[0027] In the figure: transmission gear 21, limit measurement seat 22, transmission shaft 23, secondary gear 24, annular groove 25, straight thread groove section 251, inclined thread groove section 252, opening 253, delay reversing smooth rod 26, reversing plate 27, pedestal bearing 28, transmission sleeve 29, upper limit switch 31 and lower limit switch 32, lifting screw 6, driving gear 7. Specific implementation mode

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0029] As Figures 1 to 4 shown, the present utility model provides a stroke measurement device, including a limit measurement seat 22, an upper limit switch 31, a lower limit switch 32, and a transmission gear 21;

[0030] The transmission gear 21 is connected to the limit measurement seat 22 through a transmission shaft 23. The transmission shaft 23 is rotatably installed on the support frame 8. After being driven, the transmission shaft 23 can drive the limit measurement seat 22 to reciprocate between the upper limit switch 31 and the lower limit switch 32;

[0031] When the transmission gear 21 is connected to a driving source component that starts synchronously with the gate, it can drive the limit measurement seat 22 to reciprocate between the upper limit switch 31 and the lower limit switch 32. When the gate reaches the extreme position at the highest or lowest point, the limit measurement seat 22 also synchronously contacts the upper limit switch 31 or the lower limit switch 32, thereby triggering the upper limit switch 31 or the lower limit switch 32 to achieve stroke measurement;

[0032] If the gate hoist adopts screw-type opening and closing, the driving source component is the lifting screw 6, and the lifting screw 6 is meshed and connected with the transmission gear 21;

[0033] If the gate hoist adopts winch-type opening and closing, the driving source component is a driving gear 7 coaxially connected to the rotating shaft of the gate hoist, and the driving gear 7 is meshed and connected with the transmission gear 21.

[0034] Compared with the prior art, the actual lifting height of the gate is scaled proportionally in this stroke measuring device, so that the upper limit switch and the lower limit switch do not need to be installed at the actual lifting height position, and the stroke measurement can also be realized.

[0035] Specifically, the transmission gear 21 has a double-layer tooth structure. Its outer large teeth are used for meshing and connecting with the driving source component, and its inner small teeth are meshed and connected with the secondary gear 24 coaxial with the transmission shaft 23.

[0036] In this technical solution, two schemes are designed to drive the limit measuring seat 22 to move; among them, in Scheme 1, the transmission shaft 23 and the limit measuring seat 22 are started synchronously, and in Scheme 2, the transmission shaft 23 and the limit measuring seat 22 are started asynchronously;

[0037] As Figures 3 to 4 shown, in Scheme 1, the transmission shaft 23 is a lead screw structure and is installed on the base 5 through a pedestal bearing. The limit measuring seat 22 is a corresponding lead screw nut structure or is installed on the lead screw nut. Two groups of limit measuring seats 22 are installed front and back on the transmission shaft 23 with a lead screw structure; when the gate reaches the extreme position at the highest point, one of the limit measuring seats 22 touches the upper limit switch to realize the measurement of the highest point. When the gate descends, the transmission shaft 23 rotates synchronously in reverse. When the gate reaches the extreme position at the lowest point, the other group of limit measuring seats 22 touches the lower limit switch to realize the measurement of the lowest point.

[0038] As Figures 5 to 6As shown in the figure, in Solution 2, a transmission sleeve 29 is fixedly sleeved on the transmission shaft 23. The outer large teeth of the transmission gear 21 are of a semi-tooth structure, that is, only part of the teeth are on the entire circumferential surface of the outer large teeth, thereby intermittently driving the secondary gear 24 coaxially connected to the transmission shaft 23 to rotate. At least two groups of annular grooves 25 are formed on the outer circumferential surface of the transmission sleeve 29. A delay commutation smooth rod 26 is slidably connected in the annular groove 25. The delay commutation smooth rod 26 is connected to the limit measurement seat 22. Openings 253 communicating with the annular groove 25 are formed on both axial end faces of the transmission sleeve 29 for the entry and exit of the delay commutation smooth rod 26. The annular groove 25 includes a linear groove section 251 and an inclined thread groove section 252. The linear groove section 251 is concentric with the transmission sleeve 29. The inclined thread groove section 252 is designed as an inclined spiral on the outer circumference of the transmission sleeve 29. The opening 253 is formed on the inclined thread groove section 252. One end of the commutation plate 27 faces the annular groove 25 and is installed on the pedestal bearing 28, thereby realizing the rotation of the commutation plate 27. The delay commutation smooth rod 26 is vertically installed on the commutation plate 27 and is arranged in a circular pattern on the commutation plate 27. One group of the delay commutation smooth rods 26 is connected to the limit measurement seat 22. The upper limit switch 31 and the lower limit switch 32 are installed on the moving path of the delay commutation smooth rod 26;

[0039] When the transmission sleeve 29 rotates, if the delay commutation smooth rod 26 is in the linear groove section 251, the transmission sleeve 29 continuously idles relative to the delay commutation smooth rod 26, keeping the delay commutation smooth rod 26 in its current position state. When the delay commutation smooth rod 26 is in the inclined thread groove section 252, under the pushing action of the inclined thread groove section 252, the delay commutation smooth rod 26 deflects along the extension direction of the inclined thread groove section 252 and moves out from the outlet. At the same time, an adjacent group of delay commutation smooth rods 26 enters the transmission sleeve 29 from the inlet and repeats the above actions, thereby realizing the asynchronous intermittent start of the limit measurement seat 22 relative to the transmission shaft 23. When the gate reaches the extreme position of the highest point or the lowest point, the delay commutation smooth rod 26 connected to the limit measurement seat 22 touches the upper limit switch or the lower limit switch on the moving path, thereby realizing the travel measurement;

[0040] Compared with the design of Solution 1, the design of Solution 2 can reduce the overall length of the travel measurement device and is applicable to the working conditions with limited installation length positions.

[0041] Specifically, the travel measurement device further includes an outer protective cover made of metal material, and the outer protective cover is snap-connected to the base 5.

[0042] As Figure 1As shown, further in this application, a gate hoist is also proposed. The gate hoist is a screw-type hoist or a winch-type hoist. When the screw-type hoist is adopted, the lifting screw 6 of the gate hoist is meshed and connected with the transmission gear 21;

[0043] As Figure 7 shown, when the winch-type hoist is adopted, a driving gear 7 is coaxially connected to the rotating shaft of the gate hoist. The driving gear 7 is meshed and connected with the transmission gear 21, and the thickness of the driving gear 7 is less than that of the transmission gear 21, thereby reducing the alignment accuracy requirements of the transmission gear 21 and the driving gear 7 in the transverse direction and facilitating installation.

[0044] The working principle and process of the present utility model are as follows:

[0045] When the gate hoist is started, the lifting screw 6 or the driving gear 7 of the gate hoist synchronously drives the transmission gear 21 to rotate. The transmission gear 21 drives the transmission shaft 23 to rotate through the secondary gear 24 coaxially connected with the transmission shaft 23. During the rotation of the transmission shaft 23 with a lead screw structure, the limit measurement seat 22 with a lead screw nut structure or the limit measurement seat 22 installed on the lead screw nut synchronously moves along the transmission shaft 23. When the gate reaches the extreme position at the highest point, one group of limit measurement seats 22 touches the upper limit switch to realize the measurement of the highest point. When the gate descends, the transmission shaft 23 rotates reversely synchronously. When the gate reaches the extreme position at the lowest point, the other group of limit measurement seats 22 touches the lower limit switch to realize the measurement of the lowest point, thereby realizing the function of stroke measurement.

[0046] The above has described the embodiments of the present utility model in detail, but the content described is only the preferred embodiments of the present utility model and cannot be considered as limiting the scope of implementation of the present utility model. All equivalent changes and improvements made within the scope of the present utility model should still fall within the scope covered by this patent.

Claims

1. A travel measuring device, characterized in that: It comprises a limit measuring seat (22), an upper limit switch (31), a lower limit switch (32), and a transmission gear (21); The transmission gear (21) is connected to the limit measuring seat (22) via a transmission shaft (23); the transmission shaft (23) is rotatably mounted on a U-shaped base (5); and the transmission shaft (23) can drive the limit measuring seat (22) to move back and forth between an upper limit switch (31) and a lower limit switch (32) when driven.

2. A travel measuring device according to claim 1, characterized in that: The transmission gear (21) is a double-layer tooth structure, wherein the outer large teeth are used for meshing connection with the driving source component, and the inner small teeth are meshing connection with the secondary gear (24) coaxial with the transmission shaft (23).

3. A travel measuring device according to claim 2, characterized in that: The transmission shaft (23) is a screw rod structure, and the limit measuring seat (22) is a corresponding screw rod nut structure or is installed on a screw rod nut.

4. A travel measuring device according to claim 3, characterized in that: A transmission sleeve (29) is fixedly mounted on the transmission shaft (23), and at least two groups of annular grooves (25) are constructed on the outer peripheral surface of the transmission sleeve (29). A delayed reversing smooth rod (26) is slidably connected in the annular groove (25). Openings (253) communicating with the annular groove (25) are provided on both axial end surfaces of the transmission sleeve (29) for the delayed reversing smooth rod (26) to enter and exit.

5. A travel measuring device according to claim 4, characterized in that: The annular groove (25) comprises a straight thread groove section (251) and an oblique thread groove section (252), the straight thread groove section (251) and the transmission sleeve (29) are coaxially arranged, the oblique thread groove section (252) is designed in an oblique spiral on the outer periphery of the transmission sleeve (29), and the opening (253) is constructed on the oblique thread groove section (252); One end of the reversing plate (27) is arranged facing the annular groove (25), and the delayed reversing smooth rods (26) are vertically installed on the reversing plate (27) and arranged in a circle on the reversing plate (27), wherein one group of the delayed reversing smooth rods (26) is connected to the limit measuring seat (22), and the upper limit switch and the lower limit switch of the travel switch group (3) are installed on the moving path of the delayed reversing smooth rods (26).

6. A gate hoist, comprising a stroke measuring device as claimed in any one of claims 1 to 5, characterized in that: The gate opening and closing machine is a screw type opening and closing machine, and the lifting screw (6) of the gate opening and closing machine is meshed and connected with the transmission gear (21) of the stroke measuring device.

7. A gate hoist, comprising a stroke measuring device as claimed in any one of claims 1 to 5, characterized in that: The gate opening and closing machine is a winch-type opening and closing machine, and the rotating shaft of the gate opening and closing machine is coaxially connected with a driving gear (7), the driving gear (7) is meshedly connected with a transmission gear (21), and the thickness of the driving gear (7) is smaller than the thickness of the transmission gear (21).

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